Repetition action foe upright pianos



(NOMOdGL) C. P. RASMUSSEN.

REPETITION ACTION FOR UPRIGHT PIANOS.

No. 317,198. Patented May 5, 1885.

W 5/ ATTORNEYS.

UNITED STATES PATENT OFFICEQ CARL PETER RASMUSSEN, OF COPENHAGEN, DENMARK.

REPETlTlON -ACTlON FOR UPRBGHT PIANOS.

SPECIFICATION forming part of Letters Fatent No. 317,198, dated May 5, 1885.

Application filed February 28, 1885. (N model.) Patented in Germany December 13, 1882, N0.'22,8T4, and in Denmark January 31, 1883, No. 2,192.

To all whom it may concern.-

Be it known that I, CARL PETER RasmussEN, a subject of the King of Denmark, re siding at Copenhagen, in the Kingdom of Denmark, have invented certain new and useful Improvements in Repeating-Actions for Upright Pianos, (patented in Germany December 13, 1882, No. 22,874, and in Denmark January 31, 1883, No. 2,192,) and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters and figures of reference marked thereon,

which form a part of this specification.

This invention relates to piano-actions; and it has for its object to provide a repeatingaction for upright pianos which shall possess 2o superior advantages in point of simplicity, certainty of action, and general efficiency.

With these ends in view the invention consists in the improved construction and arrangement of parts, which will be hereinafter z 5 fully described, and particularly pointed out in the claims.

The drawing hereto annexed represents a side elevation of my improved piano-action A designates the hammer-rail, B the ham- 0 mer, and Othe hopper, which are hinged, re-

spectively, to the upper and lower edge of the said hammer-rail.

D is the damper, which is hinged to the rail E, and which is connected by the wire F 3 5 with the free end of the hopper, by which it is operated in the usual manner.

The hopper O is provided with an upright or stud, G, to the upper end of which is pivoted the lever or push rod H, the upper end 0 of which is arranged to engage and operate the hammer in the usual manner. Said pushrod is held in engagement with the hammer by means of a suitably-arranged spring, I; and it is provided with a beveled projection,

J, adapted to engage the stop K, attached to the hammer-rail, the function of which is to release the push-rod from engagement with the hammer on the completion of the stroke.

1 The hopper is provided with the usual hammer-stop, L, to engage the buffer M, projecting from the socket of the hammer.

Pivoted to the stud G of hopper C is a lever, N, under which is arranged a spring, 0, whereby it is forced in an upward direction. The outer end of the said lever is slotted vertically to receive a guide-pin, P, and the lower end of a connecting-rod, Q, the upper end of which is bent, as shown, and hinged to the hammer-socket. The lower end of the said connecting-rod is screw-threaded, and provided with an adjustable nut or stop, R, resting or bearing upon the upper side of the lever N. In a transverse rail, S, above the said lever, is arranged an adjustable stop, T.

U designates the key; V, the hammer-rest rail; WV, the string, and X the transverse stop rail or rest for the push-rod H.

From the foregoing description, taken in connection with the drawing hereto annexed, the operation and advantages of this invention will be readily understood. \Vhen the key is touched, the hopper G is raised, and the push-rod H thereby caused to operate the hammer, which is simultaneously actuated by the lever N and connecting-rod Q until said lever comes in contact with the stop T, which serves to depress the said lever against the tension of the spring 0. llhe hammer, on the completion of the stroke, is retained by the stop L after the push-rod H has been thrown So out of contact with the hammer-socket by the stop K. Vhen the key is released, and the hopper with its attachments is consequently lowered, the lever N will be raised by the ac tion of the spring 1?, thus causing the connectingrod Q to carry the hammer a short distance forward toward the string sufficiently to cause the push-rod H, actuated by the spring I, to resume its operative position in contact with the hammer-socket. The result 0 is that the stroke or touch may be repeated before the key has been entirely raised.

By the construction and arrangement of parts herein described rapid repetition is made possible. Another advantage is that 5 in case of the rear ends of the keys being raised or sprung by dampness or from other causes the action will still be operative and perfect.

Having thus described my invention, I claim and desire to secure by Letters Patent of the United States 1. In an upright piano-action, the combination, with the hopper, push-rod, and ham- Iner, of the lever N, pivoted below the pushrod upon a stud upon the hopper, spring 0, placed between lever N and the hopper, connecting-rod Q, hinged at its upper end to the hammer-socket and having its lower end screw-threaded and fitting into the slotted end of lever N, and stop It, secured adjustably upon the lower end of the connectingrod, as and for the purpose shown and set forth.

CARL PETER RASMUSSEN.

IVitnesscs:

A. H. Gnrsrnn, A. HARDING. 

